Sr OM APOD A. 
209 
Crvptopus, Lair. 
A subovoifl inflated shell, curving downwards on the sides, enve- 
loping the body as well as the antennee and feet, exhibiting beneath 
a mere longitudinal fissure. The eyes are separated, and the feet in 
the form of thongs, with a lateral appendage *. 
There the eyes are concealed ; the intermediate antennae are coni- 
cal, inarticulated, and very short ; the laterals are composed of a 
peduncle, and a thread without any distinct articulations. There is 
no — at least salient — scale at their base. Such is the 
Mulcion, Lair. 
The body is soft and thorax ovoid. The feet are in the form of a 
thong, and most of them have an appendage at their base ; the fourth 
pair is the longest. 
I know but one species, the Mulcion Lesueurii, which was 
capjtured by that zealous naturalist in the seas of North America. 
The late Olivier, in the Pinna marina, found a crustaceous 
animal very similar at the first coup d’oeil to the Lesueurii, 
but the specimens were so much injiu’cd that it was impossible for 
me to study their characters. 
The Nebalise, which we at first placed in this section, having no 
natatory ajjpendages under the last segments of their body, and their 
feet being tolerably similar to those of a Cyclops, will pass with the 
Condylura into the order of the Branchiopoda, at the head of which 
they will stand. The Nebaliae, by their very prominent eyes, which 
seem to be on pedicles, and by some other characters, appear to con- 
nect the Schizopoda with the Branchiopoda. 
ORDER II. 
STOMAPODA, 
The branchiae of the Stomapoda are exposed and attached to the 
five pairs of sub-adominal appendages, exhibited to us by that part of 
the body, called tail, in the Decapoda, and which here, as in most of 
the Macroura, are fitted for natation, or are fin-feet. Their shell is 
divided into two portions, the anterior of which supports the eyes and 
intermediate antennye, or composes the head, without giving origin to 
the foot-jaws. These organs, as well as the four anterior feet, are 
frequently approximated to the mouth on two linos that converge 
VOL. in. 
Crt/plopvs Defrancii, Latr., from the Mediterranean. 
I* 
